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E. H. LY'SLIE.` oPn'cAL APPARATUS ANQ METHOD or USING THE SAME.

I APPucAnuN min novizi. |9114, Patented Apr 2 1921." ISHEETS-SHEET'I.

'H" mm E. H. LYSLE.

OPTICAL APPARATUS AND METHOD 0F USING THE SAME.

1... 2 9 1 6, 2 L p A M. na P APPLICATION FILED NOVTZT, i914. 1,375,922.

I SHEETS-SHEET 2.

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L' wage/s @i #am E, HY LYSLE. OPTICAL APPARATUS AND METHOD 0F USING THE SAME. 1,375,9224

L Ws. 1n 64M Am fm m P APPLICATION FILED NOV. 27, 1914-.

E. H. LYSLE OPTICAL APPARATUS AND METHOD 0F USING THE SAME.

A APPLICATION FILED NOV.27, I9I4.

l ,$75,922. `IIa-sented Apr. 26, 1921,

.4 1 SHEETS-SHEET 4. 6 E? 3l/9' g2g, g5 Q7 l Mm Edina/7d E. HQ LYSLE..

OPTICAL APPARATUS AND METHOD 0F USING THE SAME.

APPLICATION FILED N0v.27, 1914.

'1,375,922 Patented Apu 26, 1921D 1 SHEETS-SHEET 5.

E. II. Usui,

OPTICAL APPARATUS AND METHOD 0F USING THE SAME.

' APPLICATION FILED Nov.21, I9I4.

1 ,375;922, Patented Apr. 26, 1921.

1 SHEETS-SHEET (i4 E. H. LYSLE.

OPTICAL APPARATUS AND METHOD OF USING THE SAME. y APPLICATION FILED NOV-27, 1914. I

1,375,922-, Patented Apr. 26,1921.

/\ l ',/gf

stares EDMOD H. LYSLE, 0E NEIV YORK, N. Y.

Specification of Letters Patent.

Patented Apr., 26, 1921.

Application filed November 27, 1914. Serial No. 874,152.

To all w 7mm t may concern Be it lrnown that l, Entropie H. LYsLn, a citizen of the United States, and a resident of the city `of New York, county of New York, in the State of N ew York,l have invented y"certain new and useful improvements in tical Apparatus and Methods of Using the ame, of which the following is a full, complete, and e-:aet description.

My invention relates to optical apparatus and method of using the same. The invention is peculiarly adapted for recording and projecting pictures of objects in motion, and by its use the photographie record and the projection of the same vupon a suitable screen may be and is a 'continuous operation, as distinguished from an intermittent one, thus dispensing with and entirely eliminating the usual shutter or the use of any mechanism whatsoever, the function of which is to cause the light to pass intermittently through the lens system.

in the cameras ordinarily used for maltn ing photographic records of an animated scene or object, a suitably sensitized photographic medium is caused by various meehanical mechanisms to pass with an intermittent motion across or through the field of the lens system of the camera'Y and a shutter which has been properly synchronized to operate in connection with the fiim actuating mechanism is adapted to intermittently expose substantially adjacent portions of the hlm to the action of the light permitted to enter the camera through the lens system. The film is given an intermittently progressive motion, and a portion of the film is eX- posed during the period that the is at rest. When the shutter is closed, to prevent the entrance of light into the camera, the film is rapidly shifted or progressed to bring the next successive portion of its sensitizer surface into position for exposure and then held stationary during the period that the shutter is opened.

In apparatus ordinarily used in project ing` motion pictures, the same theory or principle of operation and the same or similar or equivalent mechanism or mechanisms are employed to cause an intermittent travel progression of the ima-ge surface, and to cause a beam of light to pass intermittently through the image strip or position print and ont of the projector, said light bei aliowed to pass through the lens to the screen at intervals when the image strip or negative is stationary. Various applications of this same idea have been heretofore developed, but the basic principle, the underlying optical theories, and the mechanical construe tions embodied therein are substantially identical.

It is obvious that when either a camera or projector of the above described ordinary type is employed, all of those phases of the motion or changes in position of the object in motion occurring during the intervals when the shutter of the camera is closed, must be lost to the record on the film, and to the projected scene on the screen, and although the proportionl of the recorded to the unrecorded action or motion of the object photographed may be considerably varied by adopting different gearing relations between the shutter and the film actuating mechanism, the shifting of the film and the incidental closing and opening of the shutter necessarily require an appreciable definite length of time, during which the photographic functions of the camera or the projecting` functions of the projector must necessarily be suspended. It is therefore readily apparent that no absolutely complete photographic record of an animated scene or object or more than a partial record of the motion of the same can be made by means of any such system or apparatus as has been above indicated.

rEhe phenomenon which is ordinarily described as a moving` picture is in reality merely an optical illusion achieved through what may be described either as a function or a lach of precision in the operation of the optic nerve and retina of the eye, and which is known as persistence of vision. The theory of motion pictures heretofore produced is based merely on the premises that if a vivid image be impressed upon the retina of the eye it will not fade therefrom for an appreciable space or interval of time, and that if a successive series of separate and distinct pictures substantially registering with each other but each representing a different or a more advanced stage in the motion of a given scene or object, be presented in such a rapid succession that the eye is unable to distinguish any period or time of change between the separate pictures, the illusion of motion will be produced.

ln the systems heretofore employed there are, however, certain inherent difficulties and shortcomings, a serious one of which is the strain to -which the eye of the observer is subjected. lV hen a picture has bee brought 5 to a stationary position betiveen the source of light and the projecting,` lens, and the mechanism has caused the shutter of the projecting' machine to open, a very brilliant and vivid image is thrown upon the screen l and thence presented to the retina. of the eye.

The shutter, however, closes almost immediately after opening', and a period follows in which there is no image or picture Whatever upon the screen. The retina of the eye, i however, does not act so quickly, and the image upon the retina, ivliicl at the moment of the opening` of the shutter Was at its maximum or brilliancy, commences to fade away from the very moment when the shutter is closed in bringing the next successive picture on the nlm into position for projec tion upon the screen. Now, in this intermittent system of projecting motion pictures the frequency of projection is so timed or calculated that the shutter or projector will reopen and throv the succeeding' picture upon the screen before thc image of the preceding picture shall have faded from the retina of the eye of the observer. There 3o must be, therefore, an appreciable interval of time required to shift the film and to close and reopen the shutter, and since there is no actual image upon the screen during); this period Of change, there is produced upon the retina of the eye a decided variation between the brilliancy of the when it is ii conveyed to the eye and when it has almof faded, just previous to the presentation thereto of the succeeding picture. it is 40 readily apparent then that, so far as the optical mechanism of the eye is concerned. the illusion of a motion picture consists in a. rapid succession of brilliant flashes and a gradual fading' aivay thereof, t e brilliant flashes beingintermittently pro-sented during the continuance of the process of projection. This intermittent quality of the light the principal cause of eye strain incidental to the observance of a motion picture. The optic nerve and various other nerves and muscles of the eye comprise virtually er:- tromely delicate and sensitive mechanism. and although by increasing,` the frequency of the presentation of the separate pictures, and by increasing` the length of time that thel shutter is open with respect to the time that it is closed, the injurious effects on thc eye may be somewhat reduced, they must 'necessarily at all times exist to a considerable extent.

lt must also be apparent that the impartation to the photographic lihn throi `lgh a projector of the rapid intermittent motion tbcve indicated tends to rapidly destroy or injure the film, which is necessarily of relatively delicate texture, and as the lm wears,

the progression thereof through the projector is liable to vary from what originally was, due, for instance, to the enlarging` of the holes or perforations in the edges of the strip or film, by means of which the motion of the diving ,sears is imparted to the film, and this Would tend to destroy the perfect registration of the successive images upon the screen, thus causing` either a. blurring` of or lack of distinctness in the resulting picture on the screen, or possibly a lateral or vertical niovcm oi. the picture as a whole upon tie screen. 30

The invention of this application may be said to differ and be distinguished from the apparatus heretofore in usel and above dcscribed in lef .vo distinct particulars, namely, (l) the film or sensitized surface of a a camera, or image surface of a projectorv is ,viven a continuous motion, as distinguished from an interaittent motion as above scribed, 'through the camera or through the projector, and (2l all ordinary forms of a() shutters are eliminated So that 'there is no interval of time during which the camera or projector when in use is not recording` or projectin.

In the system 'forming the subject matter g5 of this application, the len?.I is stationary turing the opera n of t Le mechanism, and is continuously op '1, and the film or negative or ir fe striis `given a regular conn v l tinuous steady longitudinal mo; on Within curing the operathe camera or projector l tion of the same.

The device of this application is a combined camera and projector. rEhe essential features of construction operate in the same manner Whether 'the device opei a camera, as a projector. The principal lens sys'W may be the same in th asin tl rtor. "fil" oggi-i as a projector., 'oi light is projected. through a positive Y. and out througni the lens system a. screen or similar surface. lllhen use@` as a ca Y the film is a iis inv-en -n is to provide continuously making a. contii n photographic record of l2 cbj-oct in motion.

A/gnother object of his invention is o vide an improverL optical levice, at t tilized a camera, for i photographic recort ductionoic any given scene or object Vthe loss of any of the motion or llens system upon a photographic recording medium when it is in constant motion at the po1nt,.and during the interval, of exposure.

Another object of this invention is to pro- "vide an improved optical device adapted to .stationary lens system to a xed point upon a proper screen.

Another object of this invention is to provide an improved optical device adapt-ed to be utilized as a Ameans by which a continuously moving properly sensitized photographic medium can be exposed to the action ot the rays vof light projected `by a stationary lens system for a predeterminable shorter interval than is actually required to pass the exposed portion ot the lilm across the image circle of the lens.

Another object of this invention is to provide an improved optical device for maintaining an optically precise and stationary relationship between a given object, the optical center of a iixed lens system and a constantly moving` photographic medium.

A further object of this invention is to provide an improved optical device adapted to be utilized as a camera tor producing upon a continuously moving photographic medium consecutive succession of correlated negativc photogrsfiphic records oic the successive phases oft an object in motion.

A further object et this invention is to provide an improved optical device adapted to be utilized as a camera for continuously exposing a properly sensitized photographic medium to the action ot rays oi light projected by a fixed lens system in such a manner as to produce upon the said medium a series of consecutively successive impressions such as will constitute a complete negative photographic record of the motion oi' any given object.

A further object ot this invention is to provide an improved optical device adapte-l to be utilized tor proiecting upon a proper screen a positive print made from the v4above mentioned negative photographic record, in such a manner as to present to the eye a single fixed and continuous pictorial reprowithout graphic characteristics et' the original and substantially independent oi that peculiar optical faculty,-which is commonly referred to as a persistence of vision.

A further object of this invention is to provide an improved optical device adapted to be utilized as a camera for obtaining through a xed lens system upon a continuously moving and properly sensitized medium a negative photographic record oli the 'full and precise color values of any given scene or object either stationary or in motion.

A 'further object of this invention is to provide an improved optical device adapted to be utilized for projecting` upon a proper screen a positive print made "from a negative photographic record mentioned in the 'foregoing paragraph in such a manner as to present te the eye a. single fixed continuous pictorial reproduction ot' any given scene or object without the loss of any of its visual characteristics either as to line, color or inotion.

Other objects of this invention will appear in the specification and claims below.

in the embodiment ot' my invention as illustrated in the drawings forming` a part of the present application, and as applied to a camera, I employ two sets of carriers, one for a series oi reflectors and one tor the sensitized suritace upon which the photographic record is formed, andthe first carrier for convenience will be referred to as the reflector carrier, and the second as the ilm carrier.

The co-acting portions ot the two carriers lie or are arranged in planes making right angles with each other. The cooperating portions of the two carriers are arranged to move in their respective planes in lines which make an angle of 450 with the plane of the other carrier. For convenience, the operative portions of the two carriers will be reterred to as being arranged, one in the horizontal and the other in the vertical plane. vlWhen the plane of the operative portion o'j the reflecting carrier is in a horizontal plane, the co-acting operative portion of the film carrier will lie in a vertical plane, but the direction ot the movement of said portion of the reflecting carrier in the horizontal plane will be at an angle ot 450 to the vertical plane which has been assumed to be the plane ot the co-acting,` portion of the nlm carrier, and conversely, when the plane o' the operative portion ot the lilm carrier is a vertical plane, the direction ofthe movement ot the iilm carrier in that plane is at an angle oft 450 to the horizontal plane which has been assumed to be the plane of the reector carrier.

Looking at the disposition oit the co-actine` portions of these carriers with respect to each other from another point of view, and defining their positions with respect to the principal axis of the lens system, the plane of the operative portion of the reflector carrier will be coincident with or parallel to the principal axis of the lens; the direction of thetravel oi the reflector carrier in that plane will be at an angle oi 45 to the principal axis of the lens and the motion will be, generally speaking, in a direction away from the lens; the direction of the travel ot the reflector carrier in ico llO

that plane will he at an angle of 45 to the principal axis of the lens, and the motion will he, generallj)T speaking, in a direction awa7 from the lens. At the same time the plane ot the co-ai'iting operative portion oi the lilin carrier will he coincident with the principal axis of the lens system; it will be normal to the plane oi the rei'lector carrier and the direction oit the travel ot the film carrier in said plane will he at an angle or" 45o to the principal axis of the lens and generallyv in a direction away from said lens. The disposition ot the two carriers with respect to each other7 and their direction ot travel are clearly shown in Figure Considering the apparatus to lie set up and positioned in the manner indicated in Figs. l, 2 and 3, with the operative portion of the reflector carrier lyingl in a horizontal plane, the direction oi the movement ci the reflector carrier in that plane will he at an angle of 4150 to the principal axis ot the lens, transverse thereto, and generall;7 speaking, away from the lens system, while the operative co-aeting portions oi the film can rier will move in a vertical plane coincident with the principal axis ot the lens, and the direction of the travel of the tllm will he at an angle ot LlHO to the principev aXis oi the lens, and generally spealnnr in :i

same reference characters are employed to designate the same parts throne-hout the various views, l is a side -eif'atienal view7 with the casing in section, of one embodiment oit my invention;

Fig'. 2 is a plan VTiew or" the section shown in Fig. l, the casing being shown in hori- Zontal cross section;

Fig. 3 is a diagrammatic view illiien'gating` Ain isometric projection, the relation oil the operative parts of the mechanism. shown in Figs. l and 2, to each other and to the lons system;

Fig. il a fragmentary detailed view ot the mechanism `for holding' the film on t operative portions of the film carrier, und

Fig. 5 is a side elevational vview partij.7

from the side ot the machine opposite to that slieii'ii in Fig. l;

Fig. 9 is a diagram to show how the distance between the opti il cent/eil oi the lens system and 'the operative surfaces of the tilm is maiir ,ined constant;

Figs. lC, ll ani"x l2 diagrammatic views showing how the snriaces ot the reifiectoi's l l the x'o-acting sn ces oli the carriers more with resp-ect to riaij. pian iieiY of a L 'L oe ased with a positive odnced oor zo, pie-colori produce a a nd 2 ci'ilf-in inven- .ie d ce as operas a mal; g a photorecold object in motion, ...nd

' e 'the operation ot the hen oper as a projector. eierring then particularly to Figs. l, 2 and 3, there is provioed a light-prooi casing l, witain which is inclosed the operating mechanism and upon the front side thereof is mounted a lined lens system 2 oij any approved type. which lens system is stationaril,7 mounted with respect to the casing not necessai,T to provide shutters i iterriittently ope iing and closingthe the ergere-.tion thereof, lait the Qein may he provided t -e lens when the of the casing l are loi i ale@ brackets -l noon mi d .1

nio ir of idler puleach ne the opposite ends O repectively7 and adjacent i 8 respectively.

the arms 6 an Similrdi1 jonrnaled in the arms 7 and 9 is a snai `ls arrying two idler pulleys 14g-l5, .iounted between the arms 7 and 9 of the brackets 4 5 similarly to the manner in which the idler pulleys 11 and 12 are mounted.

Also mounted in the brackets 4-5, and substantially midway between the shafts 10 and 13 is a driving shaft 16, upon which is rigidly mounted a V gear wheel 17 having teeth 18, preferably of the spiral gear type. The shaft 16 is preferably in the saine horizontal plane as the shafts 10 and 13.

Arranged over and around the idler pulleys 11, 12, 14 and 15 respectively is a carpivot pins 2O preferably extending laterally beyond the sides of the links 19, so that the said endless chain is supported upon the said idler pulleys 11, 12, 14 and 15 by the engagement of the pins. with the periphery of said idler pulleys, as is plainly indicated in Fig. 1.` lach link is provided with a block or support 21 upon each of which is mounted in any particular manner a reflector 22. These reflectors may be of any approved type, but they are shown in the drawings as being metal prisms each having a highly polished reflecting surface 23.

rlhe bracket 4 is provided at its top with laterally projecting parallel arms 24-25,

land. below, and parallel thereto with two other laterally projecting arms 262?, each pair formingbetween them guideways between which the ends of the pivot pins 2O pass and by which the series is guided in their travel between the idler pulleys 11-14, and the bracket 5 is similarly provided with similarly disposed arms 23, 29, 30 and 31, between which the opposite ends ofthe pivot pins` 20 similarly travel between the .idler pulleys 12 and 15.

The inner face of each block or support 21 of the links 19 is preferably provided with teeth 32 meshing with the teeth 18 on the opposite ,sides of the gear wheel 17. From this it is plain that when motion is imparted to the shaft 16, the gear wheel 17 is rotated and, by virtue of the engagement of its teeth 1S with the teeth 32 on the inner sides of the link 19, the vchain formed of the 'links 19 will be driven in an endless path j Y said endless chain being held in engagement Vwith the teeth of said gear 19 by the engagement of the ends of the pivot 2O with the guiding surfaces formed between the arms 24, 25, 26, 27, 28, 29, 30 and 31 and that the links will travel in a right line between the idler pulleys by reason of the engagement of the ends of the pivot pins 20 with the guideways above described.

For convenience in describing the relative position of the various parts of the mechanism with respect to each other, and with respect to the lens system, the apparatus may be presumed to be set up in the manner indicated in Fig. 1, that is to say, with the bottom of the casing 1 horizontal, the axes of theshafts 10, 13 and 16 in a horizontal plane, and the principal axis of the lens system 2 extending in a horizontal plane. 1t is to be understood, however, 'that the apparatus may be operated successfully, with the apparatus set in some plane other than the horizontal. An understanding of the relation of the oarts, however, will be most readily arriver at if it be assumed that the above described planes are horiaontal.

The reflector mechanism above described is so disposed with respect to the principal axis of the lens that the center of each reflecting surface in its horizontal operative travel between the idler pulleys is in a horizontal plane coincident with the principal axis of the lens system 2. The direction in which the reflectors travel in said horizontal plae, however, is at an angle of 45o to the principal airis of the lens system. To obtain this relation the axis of the shafts 10, 13 and li are arranged in a horizontal plane and extend at an angle of 45o to a vertical plane passing` through the principal axis of lens system. r1`he relation of the reflector system to the lens is clearly illustrated diagrammatically in Fig. 3. Y

Mounted within the casing 1 is also a film carrying system or mechanism which will be next descriljied.

lVithin the casing 1 are imunted twobrackets 33 and 34 within which is journaled a shaft The brackets 33 and 34 are preferably secured to the rea r wall of the casing 1 and their ""ee ends er* d downwardly as is clearly icated in igs. 1 and 7. rEhe bracket is provided with two laterally etending arms 36 and 3T, while the bracket 34 is provided with tv'o similarly arranged and disposed arms 33nnd 39. Within the free ends of the arms 36 and 33 is mounted a shaft 40, upon which are rigidly mounted two idler pulleys 41 and 42, and in the arms 37 and 39 is journaled a shaft 43, upon which is also rigidly mounted idler pulleys 44 and 45.

The idler pulleys 41 and 42 are spaced apart from each other and each lies adjacent its respective arm 36-33, and the idlers 44-45 arms 56, 5i,

photographic medium. In a camera this medium is preferably a sensitized strip or ilm, while in a projector, the photooraphic' medium 4:6 would be a positive print from the negative obtained from the developed film. The carrier 'for the tilm or photographic medium comprises a series of links or blocks l?, hawng; their ends pivotally connected together by pivot pins t8 thus torming substantially an endless chain structure. The width orn each link 47 is preferably substantially equal to the distance between the inner adjacent sides ot the idlcrs e?, and 43 respectively, and the idlers and l5 respectively, and the pivot pins i8 extend outwardly beyond the sides of the links or blocks l? to engage the peripheries of the idlers ll, el?, lll and l5, as the chain in its travel passes around the same. rEhe inner sides otA the. links 47 are provided with a rack 4-9 having' teeth which are adaitcd to mesh with the teeth 50 of the gear wheel 5l rigidly mounted on the shaft Preferably the teeth ot the said gear 5l and the rack i9 are oi: the spiral g type, as illustrated in the drawings.

The bracket 33 is preferably provided with two pairs oi laterally extending' arms 52, 53, 5e and 55 formino` between them guideways within which one end of each ot the pivot pins il-S pass on one side ot the chain in their travel between the idler pulleys ell and lll, while the bracket El is similarly provided with four laterally er1-tendingv 5 58 and 59, wlich respective pairs olf arms form between them similar guideways for the other ends ol' the pivot pins LlS in their travel between the idler leys 4L l5. rhe guideways 'termed a serve to hold the teeth of the racks the links or blocks il?? in driving,o enp with the teeth 50 oi the gear i heel 5l. link or block 4l carries upon. its outer surtace a block 30 preferably in the shape et one-ha t. ot' a. cube, said cube being' cut diagonally to form a prism and the tace oit the prism so' formed ha: test area is mounted to he in engl' the link.

The axes of the shatts are preferably i Y ed a/ au an., o to the principal artis ont the lens t systfvii and the 'ection the trai-:el of the clri e prisms G0 osuriet` ther-elf-yY in their course between the idlers ill-4l?) and lil-s: respectively, is in a vert: :el plane also pa.; ingr through the principiiL artis of the lei system. i

t will be seen that the reflectie.e` surface. 23 of each rel'lector is arranged toiintercept the principal reilectinoj airis ot the lens sysat an anfrle of Tl-" the said surface passes through the. same while the active surfaces of each prism of the film carrier is disposed one in a horizontal plane parallel to the princ'pal axis of t ie system and the other in a vertical plane normal to the principal axis of the lens system.

The carriers iior the reflector system and the carriers the tilin or photographic medium are driven at the saine li ear speed and therefore th cooperating surfaces thereel move synchronously with respect to each other.

Preferably the siant which is jou-,rnaled in the brackets and as above dcscribedI` is vthe main drivingv shaft el the mechanism for imparting notion to the carriers. rllhe shaft is therefore extended through a bearing Gl in the casing` l, and its outer end is provided with suitablecrank or handle G2 or other s'fziitable dea/'ice for driving the same. Upon the shaft 35 is rigidly mounted a spiral toothed rear 68 which meshes with drives a spiral toothed ajear (Sliin tarniie mounted upon a vertical shaft o whicf is journaled in suitable bearinsrs in. the bracket G6, jidly secured to il 'ior oi the casingv l. rlie vertical shart below the Lear wheel a second spiral 1o naled in the breek ts driving' shatt 'tor tne 'i to tors. Thus, when the crank G2 is tur: ed the upper course ot the series et reflectors will be caused to travel in a horizontal plane, and transverse to the piincipztl anis olE the lens system., said series o" the principal anis at an anp-le of 45C, and moving;n @generally speaking in a direction away vti ein the leus system.

Simultaneously, the lower course of the carrier system for the lihn or photographic medium 1vill be `Q jiven a motion in a vertical plane passingv through the principal axis ot the lens, the line ot travel oi said course ot the film carriers will be at an angle ot l5@ to the principal axis of lens system, the general motion oi the lower course ot the tilm carriers will be in a direction away from the lens system.

The series of prisms G0 of the film carrier virtually form a series ot steps on the under operative side of the lilrn carrier, the lower surface ot said steps beinein a horizontal plane and the side of said steps facing the lens system in a vertical plane. The i'ilm or photographic medium i6 is held smoothly against the stepped surface of the l'ilm carrier by a mechanism which will be next described.

Mounted upon the interior of the casing l is a bracket 69, carrying at its outer tree end suitable bearings 70-70, within which is journaled a shaft 7l. Said shaft is prorms the i nl.

y vided' between said bearings 70-70 with a suitable pair of sprocket wheels i2- 72, and

' upon one end et said shaift 71 is mounted *la spiral toothed gear 73. f

'n Said gear-.73 is arranged to mesh witha spiral toothed gear 7e, rigidly secured to a shait't 75 mountedto turn in bearings 'T6-77 provided on the side ot the bracket Se, and

the opposite end' 'ofthe shaft 75 is provided -preterablywith spiral toothed gear 78 arranged to mesh with a spiral toothed gear T9 on the main driving shalt 35.

- 'Y Also secured to the inside of the casing,- l

is a bracketSO similar to the bracket 69, and provided at its outer free end with bearings 81-81 within which is journaled a shaft A'82,fsaid shaft being provided with a pair of spaced idler wheels 83-83 y y b Said sprocket wheels 72-72 and spaced vidler sprocket wheels 83-83 are arranged lto supportand cai-ry a sprocket chain, which ls composed et a plurality ol links 8e pivl "otally connected together by pivot pins 85, f the widthoi the' links 8e beingl substantially equal tothe distance between the adjacent p Vfaces of the idler sprocket wheels SES-83.

Said sprocket wheels i2-'Z2 are arrangedto cooperate with opposite sides respectively`v of thefpivot pins 8?) of the sprocket cliain which project laterally beyond the sides et 1the' links 8e, and are arranged te lit into the i `sprocket teeth of the sprocket wheels 4QF-72 asthe sprocket chains pass tlierearound, and

similarly thefidler sprocket wheels 83-88 are Varranged to engage the opposite entj respectively of the pivot pins 85 as the chain passes between and around said sprocket vpassing around the sprocket wheels 72-72 and l853-83 vthe same linear speed asthat ."xvhicli theieilijn carrier receives. V3

, Moreoveiy each link 841- ot said sprocket chainis provided with an outwardly prof jecting post or bar 8 6 so positioned on said "linksjSl as tellie closely in kthe' angle` lee- 1 tween the vertical 'tace et the adjacent prism4 60, lsulostantially throughout the lower course et vhe travel of the iilm carrier. l

i lachjl-iiik Seis provided on ene end with a rounded corner 84H, the outer sur-tace of [sprocket chain is i'f'ree to iler: in ene direcwhich is? cylindrical about Vthe axis of its respective pivot, the result being that `the inon, butl is prevented rcmhexing in the opposite directionby reason ofthe fact/that theunrounded coi-ners of .the adjacent links abut, thus insuring the maintenance el the sprocket chain in a substantially right line between lthe sprocketV wheels 83-83 upon which the chain is mounted. v

Freni the above it will kbe plain that the lilm or photographic medium i6 passes into thev casing` l1 between the guide rollers 23T- 87. lt passes over the apex of a prism of the iilin carrier and almost immediately the opposite side of said iilm 46 is engaged by the post or bar 86 closely following the lirst prism on the under` course of the film carrier and as the motion of the ililm carrier and of` uthe sprocket chain continue7 the post 86 draws the film 46 tightly against the outer surface of the prisms 60 and holds the saidV film 4:6 against the stepped 'suriaceo the film carrier throughout the downward course of the iilm carrier 'withl one section ofthe film horizontal and" the immediately adjacent Vsection of the lm vertical. The converse et this operation is performed by the film carrier and posts 86 .at the end or" the downward course of travel;

that is to say, asthe prisms 60 deflect from" their straight course between` the idler pulleys el'and 44 to move iii a curvedpath Y.around the same they move awayiironi the posts or bars 86 and permitthe film `orpi'ie-v vious that theV film .is delivered to the feed rollers 87 from a dark receptacle, presumably-attached te or connected rith the casing' l, and the exposed sensitized lilmli will fe similarly delivered bythe drawing` rollers 88 to another darkened chamber roi' suitable receptacle7 in: which theexposed iilni mightfbe contained until it .could be developed. the photographic medium. or

' `lilm 46 b a positive print, it is obvious that. the might be delivered te the feed roll-l ers 8? directly from a suitable reel and delivered from thel drawing rollers 88 to a second suitable reel upon which the same would berewouiid.

y The uiiiiaratus alcove described is particularly adapted for use in producing color p iotograpliy, that is to say7 the pictures et' ebiects in'motion may be recorded in natural lOl) iio

colors upon the sensitized lilm or the lilm so, v. produced or made may be Aprojected vupon the screen by the above mechanism te produce ainotioii picture in natural colors. To accomplish this preferably provide veach of the links with a frame Stifter containing@ a color screen 90, and make the post or bar 86 constitute one side of said frame 89. The frames S9 are each so set with respect to the links 84 as to lie closely adjacent the horizontal plane of its respective prism during the downward operative course of the film on the film carrier, thus placing a suitable color screen 90 directly over the horizontal surface of the sensitized film f6 as it-enters the field of the lens, when the device is used as a camera, and to cover the corresponding print when the device is used as a projector. These frames 89 are so arranged as to consecutively present the color screens 90 in proper sequence, as for instance, screens or filters having color values corresponding t0 red, blue, and green, and of course the same sequence should be maintained in projecting upon a screen the positive prints made from negatives formed by the use of said color screens.

Inasmuch as the film carrier and the series of reflectors both travel, generally speaking, in a direction away from the lens during the operation of the device and make the same angle 45 to the principal axis of the lens system although their lines of travel are in planes normal to each other and coincident with the principal axis of the lens, it

is apparent that thc resultant motion of each,

reflector and the cooperating portion of the film in a direction parallel to the principal axis of the lens, and since the resultant of these motions in either of' these planes (for example in the vertical plane), is along the side and the hypotenuse of a right-angled isosceles triangle, as clearly indicated in Fig. 9, the distance from the optical center 0 of the lens system to any point in the exposed surfaces 46 and 4Gb of the film, will be constant and the focus may be maintained, notwithstanding the fact that a film and the reflector are constantly in motion, and that exposed portions of the film may be in different parallel planes.

Another result of this construction is that the field of illumination of the lens as projected to or upon the film or film carrier, remains stationary with respect to that portion of the film or photographic medium throughout. the time during which any portion of said film is within the field of said lens. In other words, a fixed and correct optical relationship is constantly maintained between the virtual image projected by the lens system and the film when the device is being used as a camera and between the positive and the picture on the screen when the device is used as a projector.

From the foregoing description of the apparatus of this application, particularly when used as a camera, it will be apparent that the action of the reflectors and the cooperating portions of the film as supported upon the film carrier in separate parallel planes produce substantially a focal plane camera effect in the exposure which is made on the film. The virtual image is stationarily positioned with respect to the film notwithstanding the fact that the film is constantly moving, and the exposure is the relatively gradual progressive exposure of a focal plane shutter camera. A portion of the .f'irtual image first appears along one side edge of the sufface of the film and unfolds or extends until it substantially fills the surface. rlhe virtual image first disappears from the first exposed portion of the film in the same way, that is, it begins to disappear from the side edge of the film which was first exposed and the virtual image is progressively cut off as the reflecting surface passes out of the field of illumination of said lens.

This action enables me to vary the time of the actual exposure ofthe film. By reducing the area of the reflecting surface any selected point in the exposed portion of the film will be exposed to the action of light for only that length of time required for the reflecting surface to pass through the field of illumination. lf, therefore, the reflecting surface be made narrower, the time of exposure is proportionately reduced. The reflecting surface may be made narrower in any desired manner, as for instance, by blackening a portion or portions of the reflecting surface. or by actually making the reflecting surface narrow as compared with the area of illumination of the lens system. In this manner. the sharp definition obtained in the ordinary focal plane shutter camera is readily obtained, and in fact from this point of view, this apparatus, when used as a camera, may be properly termed a camera for photographically recording objects in motion, embodying a focal plane exposure of the film.

In Figs. 10 to 12 inclusive, is illustrated in a .fliagramn'iatic manner. the way in which the cooperating surfaces of the reflectors and of the active surfaces of the prisms co-act during the operation of the device, the unshaded squares indicating the active surfaces of the prisms and the shaded squares indicating the active reflecting surfaces, two active cooperating surfaces of the prisms are designated as GO and h and two active cooperating reflecting surfaces are designated 23a andV Q3". In Fig. 10 the active portion 60h of one prism is in coextensive registration with a reflector 23. This relation occurs, however, but for a moment during the operation of the device, for from the next moment of their travel until the succeeding surfaces 60L and 23a reach the same relation with each other there will always be two adjacent reflectors coacting with two adjacent active portions of the prisms. In Fig. 1l the prism surfaces 60a and 60b and reflector surfaces 23a and 28b 12, the surfaces have continued their move ment until only one quarter of the first mentioned reflector is in active relationship with one quarter of its cooperating film carrier surface while the following reflector has Y three fourths of its surfaceV co-acting with three fourths of the surfieesofits co-acting portion of the film or film carrier. The virtual image, represented by a star, will remain stationary, with respect to the surface.

1n order to .use the device as a projector, I provide the casing'l with a lens 91 mounted in a suitable casing 92, provided. with a cap' 93 for closing the lens 91, when the same is not in use. The prisms G0 are made of glass. Referring to Fig.l 16, the said lens 91 is ydiagrammatically indicated as is the glass prism 60 and the lm1 or image strip 16. AThis film orimage strip, however, is a positive print obtained from` a negative made from the exposed film. One reflecting prism 22 is also indicated as is the fixed lens system 2. Asuitable illuminating device, such as an are or `calcium light 94 is arranged to throwits light into the casing through the lens 91. The film carrier and theV seriesof reflectors are then moved as they were when the device was used as a camera as above set forth, with the result that the prism 60 acts as a reflector for the light entering its vertical face from the lens 91 and reflects it to the cooperating reflector 22 and thence out through the xed lens 2. This is possible by reason of the fact that in the developed film there is a clear space bef tween ad'acent negatives due to the fact that thevertical surfaces of the film on its carrier during the operation of the device as a camera do not receive any light through the fixed lens system. Therefore, when the film is developed there are clear spaces co-extensive with the vertica face of the lm carrier between adj aeent negatives. This clear portion 95 of the film 46 is clearly illustrated in Fig. 141, while the negatives are indicated by the numeral 96. ln Fig. 13, the film 46 is a. sensitized film having surfaces 97 provided with a sensitive emulsion.

l/Vith the device set up and arranged as shown in Figs. 1 and 2, l prefer to mount the lens 91 in one side of the casing and to provide a reflector 98 mounted on a suitable support 99 and secured to the inside of the casing in alinement therewith so that the li ht permitted to enter the' casing througgh the lens 91 will strike first, against the reneeter 98 and be deflected.-

through the vertical surface of the glass prism 60 which may be inalinement therewith. In Fig. 15 is shown the image strip as a positive print from a negative the same being shown in the position in which it is bent during its operative engagement with the film carrier.

The apparatus forming the subject matter of this application may then be used either as a camera or as a projector. When used as a camera, the opening the condenser lens 91 is closed in any suitable' manner, as by the cap. lVhen used as a pro*- jector, the cap over the condenser lens 91 is removed and light is reflected or conducted to the interior of the casing as above described. y

When the device' is arranged to operate as a camera only, it is not necessary that the prisms 6() be made of glass; in fact, it is preferable that they should be made of some opaque substance. When, however, they are constructed of glass so as to permit of the device being used as a projector as above described, a film or stri a 19'() of opaque black paper or similar material should be fed in with the sensitized film 46 so as to come between the film and the carrier to prethe film. ln Fig. 1 and Fig. 7, the prism (39 was assumed to be of glass and the opaque paper strip 100 is'shown as interposed between the sensitized film and the film supporting surface of the film carrier, that is to say, between the sensitized film and the glass prisms 60.

lt should be noted that whenthe device is used as a projector of pictures in natural colors, the field of illumination remains stationary with respect to thescreen, except in so for as the object or image may move, while the record thereof was being taken or made, but the substantially primary and complementary colors of the visible spectrum swee; across the illuminated portion of the screen in waves. one following` the other, and, except for an instant when the illuminated portion is all of one color, there will be two colors moving across the screen continually in succession. ln other words, starting with the position in which the picture is of a color corresponding to red, and moving the apparatus slowly as the record and reflectors move the next color, that correspond to the lue will appear along one edge of the picture and will appear to move toward the opposite side of the picture while the area corresponding to the red decreases until it has appeared to have passed off the screen, at which time the color corresponding to blue will cover the entire picture. Immediatelythereafter, however, the color corresponding to blue will appear to move across the screen, as did that corresponding; to the red, while the color corresponding to the green, appearing at the side of the picture, replaces the color Correspending` to blue as fast as it moves toward the opposite side. until the entire picture is of a color correspending` to green. The color colrespondinp,` to red, however, similarly follows that corresponding to green and both appear to move in the same direction, the 'former increasing in area and the latter decreasing until the picture is again all of a color corresponding to red.

These waves of color, however; do not have any injurious effects whatever upon the eye of the observer nor is the resulting` effect due to what has heretofore been referred to as persistence ot visionf There are two colors on the screen substantially all the time, and while one set of nerves in the eye may respond more 'fully to one color (i, the red) than to another color g. the blue) nevertheless the nerves responxlinj to red respond in a somewhat less degree to blue7 and somewhat7 though to a less extent to green. A similar relation exists 7oe'tween the nerves respondinpto blue green and red7 respectivelyT and to 4green, red and 1olue respectively.

Hence it. is that the r these colors in natural sequen e on the screen, in waves keeps all trie nerves ot the eve each in some state of vibration when the li pemitted to pass through the film in tion and the action ot the waves is the relatively natural gradual action which is performed b v the eye in analyzing` any color transmitted to the eve naturalljyr.. and the eye of the observer oli pictures oli objects motion in natural colors pro-duced in accordance with the invention ot this application is not strained or iniured. Y

providing' the device when use/l a cfnncra` with screens lielft alters oi' p three colors correspondiufr prima complemental colors ol the visible truni and arranging' them in their no' u f sequence. o, the colors corre-spendi rofl. blue and @recul all the color v o'fE the objects beine' photographed will lne accuratelyv recorded on the sensitized sin'- t'accs, and when prints, trom the negatives so 4formed. are projected liv the said appara tus to a screen through light filters corrospondinjg` to the iuimarv colorsn in the same order, tho resulting` picture on the screen will show the obiect or objects in exa ct natural colors. y

In other words. bv the practice of the invention ot this application the reproduction upon screen, ot objects in all their ural colors is readily effected by first obtaini i negative photographic record containiufrall ot the true and natural chromatic chaocteristics ot a glen ohieet b v screonimv potential picture spaces on the sensitized 'apid s ccession ot medium with consecutive sets ot complemental color-value i'ilters during` the process o'l' exposure, and following this by projecting` light through a relatively transparent medium composed of a se;- ies oi' prints trom said negative `ihotographic record euch print being proiected 'ouejh a proper color screen or -ilter cor esponfling to that cup ployed during' the osure in the c era ot the corresponding s ce ol the sensitized lilm, the lilters emp-l -'ed in the i1c r lin' and projecting beine,` those which correspond to the main primary sind ccmplem colors oit the visible sjectrum arranged quence and in thei natural order.,

lVhile in the above apparatus.I all ordinary forms et shutters have been eliminated and the light is permitted to pass into or out of the lens system continuouslyx the series ot reflecting surfaces act to successively expose (in the camera) and to bring' into activ/ui (in the projector) the successi vcly :.uliacen; sections of the dni or the i'ilioton'raphir medium and to this extent the rotlectin1` edia operate as light shutters In projecting' pictures ot object in nat ural colors as above described, in the above described appara-tus the series oi" prints on the transparent medium et the projector, operate to cut off or diminish the aimoun ot light permitted to pass through parts or portions ot the medium, the light` passing through a. series of three consecutive or cemplemental prints, being' variable. and different in similar parts of the di''l'erent complemental prints depending upon the actinic value or" the lipjht ywhich was allowed to pass to the sensitized surface thi-ouch the particular color screen or filter employed in taking` the original negative oi that print. and to that extent tlm film, or series o'liinints from a given negar le, acts as a olor value shutter.

Thus, in the invention ot this application there is, from one point ot viewT a co-ac'ive operation ot a color value shutt with a reflector or cries oi reflectors acting' as light shutters, and these `featuies constitute an important part oii'the invention.

0r' course, it is to be understood that it desired, the apparatus ot this application may be used to record pictures ci objects in motion in the ordinary black and white form; that is to say by either removing' the color screens from the trames without other wise modifying changing the construen tion or operation of the mechanism and the prints made from the negatives so formed may be similarly projected without the interposition of color screens.

That any point in a film during exposure or any image strip durino` projection and within the field ot illumination of the lens is always at a iXed distance from the optical center of the lens notwithstanding the tact ioo that the film or image strip moves with respect to the lens will he clearly apparent by reference to Fig. 9. inasmuch as the reflectors 22 and the block` 60 upon which the film or strip is-supported, move at the same linear speed and each at an angle of D to the principal axis of the lens system, the distance ma hetween the optical center of the lens systemv and the surface 60a will always equal cog/e, the distance between the optical center of the lens and the surface 60h. lt therefore follows that if one portion or part lof' the film or image strip be in focus with the` device may he made without departingfrom thespirit and scope of this invention so long as such changes or modifications fall within the scope 'of the appended claims` Having thus described my invention, what l claim and desire to protect hy Letters Patent of the United States is:

l. In an optical apparatus, the combination with a fixed lens system, a series of reflectors, anda continuous film, of means to Y move said series of reflectors continuously across theprincipal axis of said lens system and at an angle of 45 degrees thereto, and means to move said film continuously in the same general direction as that in and at the same linear speed as that at which said series of reflectors is moved hut in a line intersecting the principal axis ofthe lens at an angle and in a plane normal to the plane coincident with the principal axis of the lens and the line of' travel of said reflectors.

2. ln an optical apparatus, the combination withV a fixed lens system, a series of reliectors, and a continuous film, of means to move said series of lreflectors continuously across the principal axis of said lens system at' an angleof 45O thereto, and means to move said film continuou sly in the same general direction as that in which said series of "reflectors is moved lout in a line intersecting the principal vaxis of the lens at an angle of 45o and in a plane normal to the plane coincident with the principal axis of the lens and the line of travel of said reflectors In an optical apparatus, the combina- 'tion with a fixed lens system, a film and reflect the light in a direction normal to the plane coincident with the principal axis of said lens system and the line ofmovement of said reflectors, means to move said film at the same linear speed as that of' said reflectors in a line intersecting the principal axis of said lens system at an angle thereto, said line of movement of said filmand the principal axis of said lens system lying in a plane normal to that in which lies the line of movement of said reflectors and the principal axis of' said lens system, and means to hold consecutive portions ofv said film in planes parallel t0 the plane coincident with the principal axis of said lens system and the line of travel of said reflectors with the center of each of said portions in alinement with the axis of said lens system as reflected by said reflectors, throughout the period during which each of said portions of said film is in the field of said lens.

4. In an optical apparatus, the combination with a fixed lens system, a film and series of reflectors, of means to move said reflectors consecutively through the principal axis of said lens system atan angle of 45o thereto, said reflectors each having a reflecting surface disposed at an angle of 4,5O to the principal axis of said lens system during the time when it is passing through said axis to reflect the light in a direction normal to the plane coincident with the principal axis of said lens system and the line of movement of said reflectors, means to move said film at the same linear speed as that of said reflectors in a line intersectingthe principal axis of said lens system at an angle of 450 thereto, said line of movement of said film and the principal axis ofsaid lens system lying in a' plane normal to that in which lies the line of movement of said reflectors and the vprincipal axis of said lens system` and means to hold consecutivo portions of said film in planes parallel to the plane coincident with the principal axis of said lens system. and the line of travel of said reflectors with the center of each of said portions in alinement with the axis of said lens system as reflected by said reflectors, throughout the period during which each of said portions of said film is in the fiel-l of said lens. i

5. In an optical apparatus, the combination with a fixed lens system, a film and a series of reflectors, of means to move said reflectors consecutively through the principal axis of' said lens system, said reflectorseach having a plane reflecting surface disposed at an angle to the principal axis of said lens system during the time when it is passing through said axis to reflect the light against a portion of said film, and means to move said film in a line intersecting` the principal axis of' said lens and in a plane normal to that inwhich lies the line et movement of said reflectors and the principal axis of said lens, and to hold consecutive portions of said film in planes parallel to the plane coincident with the principal axis of said lens system and the line of travel of said reflectors throughout the period during Which each portion of said film is in the field of said lens as reflected from said reflectors.

6. In a moving picture apparatus, the combination with a fixed lens and a photographic medium, of means to hold successive portions of a photographic medium in planes parallel With respect to each other, means to move said medium continuously While held in planes parallel with respect to each other', means to reflect different portions of the field of illumination of said lens into planes of focus parallel to each other and to maintain said planes of focus coincident with said planes of said medium.

7 In a motion picture apparatus, a fixer lens system,a reflector, means to continuously move said reflector across the field of said lens at an angle of' 45o to the principal axis of said lens system and in a direction generally away from said lens, a photographic medium, means to move said medium at the same linear speed as that of said reflector and in a line disposed at an angle of 450 to the principal axis of said lens, axis of said lens system being at the intersection of two planes disposed at right angles to each other, one plane being coincident with the line of travel of the center of said reflector and the other plane being coincident with the line of travel of the center of said medium.

8. In a motion picture apparatus the combination of a fixed lens system, a photographic medium, means to impart to said medium a continuous motion, a series of reflectors, means to impart a steady uninterrupted motion to said reflectors, said motion being of the same linear speed as that of said medium, to bring adjacent portions of said film continuously into the reflected field of said lens and to hold said field stationary with respect to and in focus with that portion of said film which may be in said field.

9. In a motion picture apparatus the combination with a fixed lens system, of a film carrier, means to continuously move said carrier, a series of reflectors, and means to continuously move said series of reflectors at the same linear speed as said carrier to maintain a fixed focal distance between said lens and any portion of said carrier which may be in the field of said lens at any time and throughout the time during which it is in said field.

10. In a motion picture apparatus the combination of a fixed lens system, a film carrier, means to continuously move said carrier, a series of reflectors, means to continuously move said reflectors at the same linear speed as said carrier to maintain a fixed focal distance between said lens system and any )oi-on of said carrier which may be in the field of said lens and throughout the period during` which it is in said field, and to maintain said field stationary with respect to that portion of said film Which may be in said field and throughout the period during which it is in said field.

1l. In a motion picture apparatus, the combination of a single fixed lens system, a photographic film, means to impart a constant steady motion of travel to said film, in a path angularly disposed to the principal axis of said lens system, a set of reflecting mediums disposed between said film and said lens, means to move said reflecting mediums at the same linear speed as said film to maintain correct optical relationship at all times between any given point on said film and the optical center of said lens system While it is in the field of said lens system.

12. In a motion picture apparatus, a. fixed lens system, a reflector, means to continuously move said reflector through the field of illumination of said lens system to reflect the light at an angle to the principal axis of said lens system, a photographic medium, means to cause said medium to lie in a plane normal to the axis of the lens as reflected by said reflector', and means to move said photographic medium at the same linear speed as said reflector is moved and at an angle to said reflected axis of said lens system to hold said field stationary with respect to said medium and to maintain said medium in the plane of focus of said lens system.

13. In a motion picture apparatus, a fixed lens system, a series of reflectors, a carrier for a photographic medium, means to form a photographic medium into a series of separate parallel planes` means to move said reflectors continuously in a direction across the principal axis of said lens, and means to continuously move said carrier to bring said parallel planes through the axis of said lens as reflected by said reflectors and to maintain the distance constant between any exposed portions of said planes and the optical center of said lens system.

14. In a motion picture apparatus, means to form a photographic medium into a series of parallel planes, means to successively and continuously bring said planes into the focus of said lens and move the same continuously through thearea of illumination of said lens system, all the planes Within said area of illumination being in the focus of said lens system,

15. In an optical apparatus, a fixed lens system, means to cause reflected portions ofv the virtual image projected by said lens system into different parallel planes and to constantly move said planes, a carrier for the photographic medium provided with a series of parallel plane surfaces, and means to successively bring said plane surfaces of said carrier suc'cessivelji7 into, and through the moving planes of said virtual image.

16. ln an optical apparatus, a fixed lens system, a carrier for a nphotographic medium, said carrier having operative surfaces arranged' in a series of parallel planes, and means to move saidsurfaces across the field ofillumination of said lens and to maintain said surfaces at a fixed focal distance from said lens throughout the period during which said surfaces are in said field.

17. In anoptical apparatus, a fixed lens s s stem a carrier for a )hotoeraohic me- 5 C which said surfaces are in said field and to v dium, said carrier having operative surfaces arranged in a series of parallel planes, and means to move said surfaces across the field of illumination of said lens and to maintain said surfaces at a fixed focal distance from said lens throughout the period during maintain `said field stationary with respect tov said surfaces. p

18. 1n an optical apparatus, a film car- Y rier having a stepped series of operative surfaces' arranged in parallel planes, and means to cause a continuous photographie rmedium to conform to said surfaces, a fixed lens system, and. means for continuously moving said carrier through the field of said lens.

" lens'systein, means to bring a photographic medium into a substantially consecutive series of separate parallel planes, means to continuously :move said record so shaped ,into and Vthrough the plane of the focus of Y saidlens. l

21. ln a motion picture apparatus, a fixed lens system,meaiis to bring a 'photographic *medium into a series of parallel planes, and

means to continuously move said medium so shape-d through the planes of the focusof said lens and to hold said planes of focus stationary `with respect to said planes of said photographic medium when and while any of said planes are inthe planes of the focus of said lens system.

I with v,the potential picture spaces, Athe said 22.1nV a motion ,picture apparatus, the combination-.as substantially set forth of a single fixed lens system, a continuously moving recording medium and a plurality of refleetingV mediums which are co-extensive reflecting vmediums being disposed to reflect lightlbetween said lens system and said recording medium, and means to move said reflecting mediums with respect to the recording medium at the same linear speed to simultaneously Vmaintain an optically stationary relationship between the lens system and consecutively successive portions of the .recording medium at the-point and during the interval of exposure.

23. 1n an optical device for making a negative photographic record upon a continuously moving photographic medium, the combination of a continuously open lens system, a continuously moving photographic medium and a plurality of reflecting mediums, and means to move said reflecting mediums at the same linear speed as that of said photographic medium to constantly maintain an optically stationary relationship between the said photographic medium and the optical center of the lens system, at the point and during the interval of ex posure.

` 2d. ln an apparatus for projecting a continuous pictorial reproduction of an object in motion, the combination yof a single fixed lens system, a constantly moving projecting medium, and a plurality of reflecting mediums, means tomove said reflecting mediums at the same linear speed as said projecting medium to constantly present to the lens system a single complete and animated picture of the said object in motion, and to constantly maintain a xed and common optical relationship between correlated points' vpath disposed at the same angle to the axis of said lens system as that of the travel of said film to maintain a correct optical relationship atall times between a given point upon the film and the corresponding point in the visual field of the lens system.

26. lna motion picture apparatus, a fixed lens system, a reflectorpassing through the principal axisV of said lens system at an `.angle of 45 and arranged to reflect the light passing through said lens at an angle of 90O to the principal axis, a film arranged to pass through the axis of light as reflected from said refiector and to lmove at an angleof 45o `to the principal axis of said lens in the plane of the principalaxis of said lens and normal to the plane in which is the line of travel of said reflector and the principal axis of said lens.

27. ln a motion picture apparatus, a fixed 

